I've heard of it. Sounds epic. Can I get some links or something so I can get down as well?

Do I need a bad ass computer to play or will a pretty good one from Best Buy suffice?

Do you have Steam? It's easiest to buy from there. Arma 2: Combined Operations. It has the original game and Arma 2: Operation Arrowhead. Both are needed to play the game. It's $17.99 right now so that is a pretty good deal. The DayZ mod is free.

And you probably can play it on that machine but you'd have to turn settings down low. I've read a lot of people suggesting everyone turn settings on low anyway, so I don't think you'll be missing out on a lot.